Bottle cap



FIG. 1 is an isometric view of a bottle cap showing my new design;

FIG. 2 is a left side elevational view;

FIG. 3 is a right side elevational view;

FIG. 4 is a rear elevational view;

FIG. 5 is a front elevational view; and,

FIG. 6 is a top plan view.

The bottom and interior of the bottle cap form no part of the claimed design. 

The ornamental design for a bottle cap, as shown and described. 